I had this problem before. Try to put ID of your numeric textbox same as your field column property. I think Syncfusion uses this data to related between the elements.. something like that.
NPNaveen Palanivel Syncfusion Team March 15, 2023 01:28 AM UTC
We checked your query, we prepared sample based on given
code snippet but the reported issue of focus does not go to the numeric text
box in gird after edit the row does not occurs at our end. Please refer the
attached sample for your reference